In many loft conversions the bathroom can be en-suite or accessible from a landing.
Most lofts are suitable for conversion
You can check yourself by measuring the floor of your loft to the apex of your roof and this measurement is more than 7ft 6″ (2.3 metres, 90″ or 230cms) then you have a good chance of gaining the extra space you require. A consultation visit is FREE, I can help you with a ball park figure and ideas of how to get maximum space for your conversion.
Please email me through this contact form to organise a suitable time for me to pop round.